TCP Extensions for Immediate Retransmissions

Document Type Expired Internet-Draft (individual)
Author Lars Eggert 
Last updated 2005-06-29 (latest revision 2004-09-13)
Stream (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document classifies connectivity disruptions along an end-to-end path into four types and describes how standard TCP mechanisms can lead to inefficient or over-aggressive sending behavior when connectivity resumes. The proposed techniques for TCP mobility detection and response (LMDR) can improve behavior for some types of disruptions. This document describes another, complementary and orthogonal modification to TCP's retransmission scheme that improves performance for disruption types that TCP LMDR does not address. This extension is based on connectivity indicators, i.e., generic network events that may indicate that end-to-end connectivity has resumed. This document focuses on TCP modifications that use connectivity indicators to increase performance, but does not define the specifics of such connectivity indicators itself.


Lars Eggert (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)